washingtonpost.com – The vast majority of us — about 80 percent, according to the U.S. Census Bureau — speak English at home. But we are a polyglot society in which big pockets of non-English speakers dot the national landscape. Our good friends at @MetricMaps have put together a cool gif that shows where the highest concentrations of English, Spanish, Indo-European and Asian languages are spoken around the country. English speakers by county (Note: